The increasing order of electron affinity of the electronic configurations of element is:
(I)` 1s^2 2s^2 2p^6 3s^2 3p^5`
(II) `1s^2 2s^2 2p^3`
(III) `1s^2 2s^2 2p^5`
(IV) `1s^2 2s^2 2p^6 3s^1`

Options

A. `II lt IV lt III lt I`
B. `I lt II lt III lt IV`
C. `I lt III lt II lt IV`
D. `IV lt III lt II lt I`

Answer

A